Consolidated Balance Sheets (Parenthetical) - $ / shares |
May 31, 2018 |
May 31, 2017 |
|---|---|---|
| Statement of Financial Position [Abstract] | ||
| Common stock, par value | ||
| Common stock, shares authorized | 20,000,000 | 20,000,000 |
| Common stock, shares issued | 3,994,545 | 2,995,910 |
| Common stock, shares outstanding | 3,994,545 | 2,995,910 |